<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>rejectionhandled</title>
    </head>
    <body>
        <script>
            window.addEventListener('unhandledrejection', (event) => {
                event.preventDefault();
                console.log('Reason: ' + event.reason);
            });

            window.addEventListener('rejectionhandled', (event) => {
                console.log('REJECTIONHANDLED');
            });

            function foo() {
                return Promise.reject('abc');
            }
            var r = foo();
            setTimeout(() => {
                r.catch((e) => {});
            }, 0);
        </script>
    </body>
</html>
